France Martin Souchay · CC BY-SA 3.0
The descent
The entrance, at 100 m.
The real relief above Grotte de Clamouse, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey. No depth has been published for this cave yet.
100m
Entrance altitude
from the 30 m relief model
15°C
Inside, all year
the yearly average outside, at the entrance
270m
Rock above
the highest point within 1.5 km
Inside and outside
15 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 15 °C here, in January and in August. In July the afternoon reaches 30 °C at the entrance, 14 °C warmer than inside: take a jacket. The best months to escape the heat are from July to August. The wettest months are from October to November: water rises fast underground, so never go in without a guide after heavy rain.
- 10°4°Jan
- 11°4°Feb
- 14°6°Mar
- 18°9°Apr
- 22°12°May
- 27°17°Jun
- 30°19°Jul
- 29°19°Aug
- 25°15°Sep
- 20°12°Oct
- 15°8°Nov
- 11°5°Dec
Outside: afternoon and night averages for 1991–2020 (NASA POWER) brought to the altitude of the entrance. Inside: the yearly average, which deep parts of a cave keep. Near the entrance it follows the weather a little.
Cave in France
Grotte de Clamouse is a show cave in France. The entrance is at 100 m. It has an underground river and stalactites and stalagmites. It is open to visitors.
Getting there.
- Show cave: open to visitorsticket requiredOfficial site↗
- Saint-Jean-de-Fosnearest town · 1.0 km in a straight line
- Parking 120 m awaynearest car park in OpenStreetMap, straight line
- Viewpointsnearest viewpoint · 0.4 km from the entrance
- Montpellier-Méditerranée Airport (MPL)nearest airport with scheduled flights · 36 km in a straight lineCar hire at MPL airport (Montpellier/Méditerranée)Discover Cars · sponsored link↗
Plan the visit
Guided tours, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The water
The Canal de Gignac, branche de Ceyras runs highest from October to December.
The Canal de Gignac, branche de Ceyras carries about 31 m³/s on average here. It runs highest from October to December. It is lowest from July to August.
- 44 m³/sJan
- 37 m³/sFeb
- 37 m³/sMar
- 40 m³/sApr
- 31 m³/sMay
- 17 m³/sJun
- 7.9 m³/sJul
- 6.2 m³/sAug
- 18 m³/sSep
- 47 m³/sOct
- 61 m³/sNov
- 49 m³/sDec
From about 6.2 m³/s in the lowest month to 61 m³/s in the highest. Its basin above this point covers 1,277 km².
Follow the Hérault from source to mouth on Riveryas
Estimate: long-term flow from the HydroATLAS model (WaterGAP, 1971–2000) shaped by the monthly rain, snow and temperature of the area (NASA POWER). Dams change it. Not a forecast.
From above.
The ground above the cave, with the relief shaded, the line of the section and what people have mapped around the entrance.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the section above. Points © OpenStreetMap contributors.
Around the entrance.
- 30other cave entrances within 3 kmGrotte de Clamouse, Grotte du Contrebandier, Grotte des Plôs and 27 more
- 5springs within 2 kmSource de Clamouse, Descente gorges, Font-Caude and 2 more
- 9viewpoints within 3 kmPoint de vue Max Nègre, Belvédère du Berger and 7 more
- 8marked hiking routes within 3 kmCSG 11 : Saint-Maurice-Navacelles - Saint-Guilhem-le-Désert, Les Fenestrettes, Notre-Dame-du-Lieu-Plaisant and 5 more
- 2climbing crags within 3 kmSaint-Guilhem-le-Désert, Parapluie
- 18car parks within 2 km
- 16information boards and visitor centres within 3 km
- 10bus stops within 2 km
- 7campsites within 8 kmLe Septimanien, La Source Saint-Pierre, Aire de stationnement Aniane and 4 more
- 34hotels and guesthouses within 8 kmLa Clé, Hostellerie Saint-Benoît, Gîte de la Tour and 31 more
- 26restaurants and cafés within 3 km
- sinkholes within 3 km
- caving clubs and spots within 15 km
- named waterfalls within 4 km
Counted in OpenStreetMap, the map anyone can edit, around the entrance. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Saint-Jean-de-Fos1.0 km in a straight line
- Aniane3.8 km in a straight line
- Montpeyroux4.1 km in a straight line
- Gignac6.4 km in a straight line
- Saint-André-de-Sangonis7.7 km in a straight line
- Le Pouget13 km in a straight line
- Montarnaud14 km in a straight line
- Vailhauquès14 km in a straight line
In our other atlases
What else is around Grotte de Clamouse.
The river at the entrance, the waterfalls, the lakes, the mountains and volcanoes above, the canyons, beaches and islands nearby — from our other atlases.
Peakyas7 mountains within 10 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | 10 | 11 | 14 | 18 | 22 | 27 | 30 | 29 | 25 | 20 | 15 | 11 |
| Afternoon | 10 | 11 | 14 | 18 | 22 | 27 | 30 | 29 | 25 | 20 | 15 | 11 |
| Night | 4 | 4 | 6 | 9 | 12 | 17 | 19 | 19 | 15 | 12 | 8 | 5 |
| Rain (mm) | 52 | 39 | 48 | 59 | 49 | 30 | 20 | 25 | 51 | 82 | 73 | 46 |
| Rainy days | 8 | 6 | 7 | 9 | 8 | 6 | 4 | 6 | 7 | 10 | 10 | 8 |
| Sun hours/day | 3.8 | 5.2 | 6.3 | 7.3 | 8.6 | 10.6 | 11.1 | 9.7 | 7.8 | 5.0 | 4.1 | 3.6 |
| Snow on the ground (cm) | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 10 | 10 | 4 | 52 | 3.8 |
| Feb | 11 | 11 | 4 | 39 | 5.2 |
| Mar | 14 | 14 | 6 | 48 | 6.3 |
| Apr | 18 | 18 | 9 | 59 | 7.3 |
| May | 22 | 22 | 12 | 49 | 8.6 |
| Jun | 27 | 27 | 17 | 30 | 10.6 |
| Jul | 30 | 30 | 19 | 20 | 11.1 |
| Aug | 29 | 29 | 19 | 25 | 9.7 |
| Sep | 25 | 25 | 15 | 51 | 7.8 |
| Oct | 20 | 20 | 12 | 82 | 5.0 |
| Nov | 15 | 15 | 8 | 73 | 4.1 |
| Dec | 11 | 11 | 5 | 46 | 3.6 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (100 m) with the standard lapse rate. Not a forecast.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 92% | 27% | 48% | 122% | 128% | 181% | 34% | 116% | 138% | 45% | 48% | 115% |
| 2021 | 40% | 89% | 17% | 54% | 86% | 80% | 147% | 84% | 144% | 60% | 105% | 72% |
| 2022 | 40% | 22% | 124% | 53% | 19% | 79% | 201% | 145% | 196% | 17% | 77% | 133% |
| 2023 | 32% | 53% | 48% | 24% | 101% | 137% | 67% | 58% | 54% | 56% | 32% | 30% |
| 2024 | 66% | 94% | 231% | 56% | 144% | 93% | 91% | 67% | 185% | 70% | 50% | 33% |
| 2025 | 36% | 61% | 59% | 34% | 33% | 17% | 63% | 60% | 23% | 15% | 32% | 153% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Grotte de Clamouse
France
- —Depth
- —Galleries
- 100 mEntrance altitude
- 15 °CInside, all year
Grotte des Demoiselles
France · 27 km
- —Depth
- —Galleries
- 292 mEntrance altitude
- 13 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q2975544) · CC0 |
|---|---|
| The relief above, the entrance altitude, the section and the 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| River flow and basin | HydroATLAS / RiverATLAS v1.0 (Linke et al. 2019) · CC BY 4.0 |
| Climate | NASA POWER, 1991–2020 |
| Entrances, springs, sinkholes, opening hours and what is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, lakes, mountains, canyons, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
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Every lake on Earth: water temperature, ice, depth and the shore.Visit mountains
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Every river from source to sea: the journey, the flow and the basin in numbers.Visit 
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Every cave with its real depth and length: the rock above, the temperature inside all year, and how to visit.You are here
dark skies
Where the night is still dark: the sky of every place, the Milky Way month by month, the Moon, eclipses and auroras.Coming soonVisit 
viewpoints
Every viewpoint with its real 360° panorama: the peaks you can name, how far you see and where the sun sets.Coming soonVisit 
birdwatching
Every bird sanctuary and wetland with the species recorded month by month: who is resident, who comes for the summer, who only passes through.Coming soonVisit 
forests
Every forest with its land-cover rings, what grows and lives in it, and the best months to walk it.Coming soonVisit